Browser would be simplest. Even though I prefer Linux and do run it, Windows might be better in your case with it having the DRM support and apps to run those services at higher resolution and HDR that sticking with browser might not allow.
For my case I picked up a cheap MiniPC and install Fedora on it to use instead of the TV interface.
Vittelius@feddit.org 5 days ago
There are third party clients for a lot of streaming services as kodi add-ons. Here for example is the add-on for P+: matthuisman.nz/…/paramount-plus-kodi-add-on.html
Please keep in mind that I haven’t used these for years and can make no comment on whether they still work. There are also some inherent limitations. Quality will be caped at 720p for example because widewine Linux bullshit